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Category: Sizing Guide

link to How to Calculate Duct Size? (Best Duct Size)

How to Calculate Duct Size? (Best Duct Size)

HVAC ducts are sized based on the required airflow. Ducts have different forms and shapes with different dimensions. So, how do you size a duct? And, how do you know which duct size is the best...

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link to How to Calculate Pressure Drop Across a Valve?

How to Calculate Pressure Drop Across a Valve?

There are many valves installed in a chilled water system. Every valve has its own pressure drop which the chilled water pump must overcome to supply enough flow to all air handling units. So, how do...

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link to Air Conditioner Sizing Guide: Sizing Chart (BTU & Ton)

Air Conditioner Sizing Guide: Sizing Chart (BTU & Ton)

Rule of thumb is a great way to size an air conditioner most of the time. However, one calculation method can't be used for all applications. Thus, I created multiple sizing charts for the most...

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link to Return Air Grille Sizing Guide: CFM Chart & Calculation

Return Air Grille Sizing Guide: CFM Chart & Calculation

There are many different sizes available for a return air grille. Using the correct return air grille size is important to ensure that the HVAC system has sufficient airflow as well as low noise. So,...

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link to How to Size Cooling Tower Make Up Water Tank?

How to Size Cooling Tower Make Up Water Tank?

The make-up water tank is one of the major pieces of equipment in chilled water systems. Its job is to replenish water to cooling towers when the condenser water evaporates to the surrounding. I...

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link to How to Size Chilled Water Pipe? (Friction Loss Chart)

How to Size Chilled Water Pipe? (Friction Loss Chart)

Air conditioning chilled water systems connect all equipment using chilled water pipes. Without using sophisticated software, how to size chilled water pipes with a chart? In the following, I'll...

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About Me

Hi, my name is Yu Chang Zhen. I've been working as a professional in the HVAC industry for more than 7 years, covering from design and installation to commissioning and maintenance. With my experience, I want to help people solve their HVAC problems. Welcome, I hope you can find your solutions here.

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